Saragih, G., Purwandari, V., Akbari , A. Z., Silitonga, N. and Abdillah, A. (2025) “Optimization of Solvent-Assisted Exfoliation of Low Rank Coal for Few-Layer Graphene Production via Multi-Stage Ultrasonication”, Jurnal Riset Teknologi Pencegahan Pencemaran Industri, 16(2), pp. 168–175. Available at: https://jrtppi.id/index.php/jrtppi/article/view/249 (Accessed: 20 February 2026).